Which of the following shows the proper rhythmical (节奏的) pattern of the sentence?

A. It was "too ex"pensive for me to "buy.
B. It was "too "expensive for me to "buy.
C. It was too ex"pensive for "me to "buy.
D. It "was too "expensive for me to "buy.

In terms of manner of articulation 发音方法, the sounds [p], [b], [t], [d], [k], [g] are__________.

A. affricates 塞擦音 

B. fricatives 擦音 

C. bilabial 

D. oral stops

The producers of oil and other __________ commodities have an advantage.

A. fragile 

B. nonperishable 

C. waterproofed 

D. stainless

Being__________ of money, she managed to save enough for a holiday.

A. economic 

B. economical 

C. economics 

D. economies

Farmers are allowed to grow small gardens of their own and they sell their vegetables__________ the black market.

A. on 

B. at 

C. in 

D. for